Feel free to add to the list

1: Eggs
They sell them in packs of 6. (Half a dozen)
But for some reason they dont sell them in packs of 12 (full dozen)
Instead we only get 10... Where are my other 2 eggs?
Check your refrigerators and you will see that there is only space for....dun dun DUN... 10 eggs (not 12 like normal western fridges)

Its an egg conspiracy between the people who produce the eggs and the people who make the fridges to rip us off for 2 eggs...
2: Washing machines. Not really conspiracy, but just plain fucking weird.
TEN years and they still dont make machines that can wash clothes with HOT water.
And no I will never use bath water to wash my clothes. That just makes me sick.

However! if you go to a coin laundry (laundromat) all the machines there use... dun dun DUN.... hot water!!!
So its not like its an unknown concept...